import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/Users.vue'
import Rights from './components/power/Rights.vue'
import Roles from './components/power/Roles.vue'
import Cate from './components/goods/Cate.vue'
import Params from './components/goods/Params.vue'
import GoodsList from './components/goods/List.vue'
import Add from './components/goods/Add.vue'
import Order from './components/order/Order.vue'
import Report from './components/report/Report.vue'


Vue.use(Router)


const router = new Router({
  routes: [
    {path: '/',redirect:'/login'},
    {path: '/login', component: Login},
    {path: '/home',component: Home, 
    redirect: '/welcome',
    children:[
    { path: '/welcome',component: Welcome },
    { path : '/users',component: Users},
    { path : '/rights',component: Rights},
    { path : '/roles',component: Roles},
    { path : '/categories',component: Cate},
    { path : '/Params',component: Params},
    { path : '/goods',component: GoodsList},
    { path : '/goods/add',component: Add},
    { path : '/orders/',component: Order},
    { path : '/reports/',component: Report},
      ]
    }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to,from,next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  //     next() 放行  next('/login) 强制跳转
  // 如果用户访问的登录页，直接放行
  if(to.path === '/login') return next()
  // 从 sessionStorage 中获取保存的 token 值
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token值，强制跳转到登录页
  if(!tokenStr) return next('/login')
  next()
})

export default router
